Bambance-bambance tsakanin ma'auni da matsayi
GB/T 9948: Yana da amfani ga bututun ƙarfe maras nauyi a cikin matsakaici da matsanancin zafi (≤500℃) al'amura kamar su.fasa man feturkumasinadaran kayan aiki, kuma yana cikin ma'aunin bututu na musamman.
GB/T 5310: Musamman tsara donhigh-matsi boilers(Sigar tururi ≥9.8MPa), yana jaddada aminci na dogon lokaci a ƙarƙashin babban zafin jiki da matsa lamba kuma shine ainihin ma'aunin bututun tukunyar jirgi.
Mabuɗin bambance-bambance a cikin kayan aiki da aiki
Abubuwan sinadaran
Idan aka kwatanta da karfe 20,20Gkarfe yana da iko mai ƙarfi akan ƙazanta (kamar P≤0.025%, S≤0.015%), kuma yana buƙatar adadin adadin abubuwan da suka rage (Cu, Cr, Ni, da sauransu) don zama ≤0.70% don tabbatar da kwanciyar hankali mai zafi.
Kayan aikin injiniya
A dakin-zazzabi tensile ƙarfi na 20G (410-550MPa) alama zo zoba tare da na 20 karfe (≥410MPa), amma 20G bukatar bugu da žari tabbatar da high-zazzabi jimiri ƙarfi a 450 ℃ (≥110MPa), wanda shine ainihin buƙatun bututu don tukunyar jirgi.
Karamin tsari
20G yana buƙatar dubawa don ƙimar spheroidization na pearlite (≤ grade 4) don hana lalacewar microstructure bayan sabis na zafi mai tsayi na dogon lokaci, yayin da karfe 20G ba shi da irin wannan buƙatun.
Bambance-bambancen tsari na masana'anta
Maganin zafi
20G dole ne a sha magani na yau da kullun (Ac3+30 ℃) don tabbatar da girman hatsi na sa 5-8. 20 karfe za a iya annealed ko al'ada, da kuma tsarin sarrafa ne in mun gwada da sako-sako da.
Gwajin mara lalacewa
20G yana buƙatar gano lahani na mutum ultrasonic da gwajin eddy na yanzu don kowane yanki, yayin da 20G karfe yawanci yana buƙatar gwajin samfuri kawai.
Kwatanta yanayin aikace-aikacen
20G: Tashar wutar lantarki (bangayen sanyaya ruwa, superheaters), sinadarai masu ƙarfi mai ƙarfi (al'amuran tare da yanayin ƙira> 350 ℃)
20 karfe: Tube daure don dumama tanderu a cikin matatun mai, bututun don yanayi da kuma injin distillation raka'a (zazzabi yawanci <350 ℃)
Bukatun Takaddun shaida
20G karfe bututu bukatar samun Special Equipment Manufacturing License (TS takardar shaida), kuma kowane tsari dole ne ya samar da wani high-zazzabi yi rahoton gwajin. 20 karfe kawai yana buƙatar takaddun garanti na yau da kullun.
Shawarwari na zaɓi:
Lokacin da yazo ga ayyukan takaddun shaida na ASME ko PED, 20G na iya yin daidai daSA-106/ ASTM A192, yayin da 20 karfe ba shi da wani rubutu kai tsaye zuwa daidaitattun kayan Amurka.
Domin aiki yanayi sama da 540 ℃, gami karfe kamar 12Cr1MoVG ya kamata a yi la'akari. Matsakaicin matsakaicin zafin jiki na 20G shine 480 ℃ (mahimmin batu na graphitization na carbon karfe).
Lokacin aikawa: Mayu-23-2025
